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Mirrors > Home > ILE Home > Th. List > 3halfnz | GIF version |
Description: Three halves is not an integer. (Contributed by AV, 2-Jun-2020.) |
Ref | Expression |
---|---|
3halfnz | ⊢ ¬ (3 / 2) ∈ ℤ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1z 9080 | . 2 ⊢ 1 ∈ ℤ | |
2 | 2cn 8791 | . . . . 5 ⊢ 2 ∈ ℂ | |
3 | 2 | mulid2i 7769 | . . . 4 ⊢ (1 · 2) = 2 |
4 | 2lt3 8890 | . . . 4 ⊢ 2 < 3 | |
5 | 3, 4 | eqbrtri 3949 | . . 3 ⊢ (1 · 2) < 3 |
6 | 1re 7765 | . . . 4 ⊢ 1 ∈ ℝ | |
7 | 3re 8794 | . . . 4 ⊢ 3 ∈ ℝ | |
8 | 2re 8790 | . . . . 5 ⊢ 2 ∈ ℝ | |
9 | 2pos 8811 | . . . . 5 ⊢ 0 < 2 | |
10 | 8, 9 | pm3.2i 270 | . . . 4 ⊢ (2 ∈ ℝ ∧ 0 < 2) |
11 | ltmuldiv 8632 | . . . 4 ⊢ ((1 ∈ ℝ ∧ 3 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((1 · 2) < 3 ↔ 1 < (3 / 2))) | |
12 | 6, 7, 10, 11 | mp3an 1315 | . . 3 ⊢ ((1 · 2) < 3 ↔ 1 < (3 / 2)) |
13 | 5, 12 | mpbi 144 | . 2 ⊢ 1 < (3 / 2) |
14 | 3lt4 8892 | . . . 4 ⊢ 3 < 4 | |
15 | 2t2e4 8874 | . . . . 5 ⊢ (2 · 2) = 4 | |
16 | 15 | breq2i 3937 | . . . 4 ⊢ (3 < (2 · 2) ↔ 3 < 4) |
17 | 14, 16 | mpbir 145 | . . 3 ⊢ 3 < (2 · 2) |
18 | 1p1e2 8837 | . . . . 5 ⊢ (1 + 1) = 2 | |
19 | 18 | breq2i 3937 | . . . 4 ⊢ ((3 / 2) < (1 + 1) ↔ (3 / 2) < 2) |
20 | ltdivmul 8634 | . . . . 5 ⊢ ((3 ∈ ℝ ∧ 2 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((3 / 2) < 2 ↔ 3 < (2 · 2))) | |
21 | 7, 8, 10, 20 | mp3an 1315 | . . . 4 ⊢ ((3 / 2) < 2 ↔ 3 < (2 · 2)) |
22 | 19, 21 | bitri 183 | . . 3 ⊢ ((3 / 2) < (1 + 1) ↔ 3 < (2 · 2)) |
23 | 17, 22 | mpbir 145 | . 2 ⊢ (3 / 2) < (1 + 1) |
24 | btwnnz 9145 | . 2 ⊢ ((1 ∈ ℤ ∧ 1 < (3 / 2) ∧ (3 / 2) < (1 + 1)) → ¬ (3 / 2) ∈ ℤ) | |
25 | 1, 13, 23, 24 | mp3an 1315 | 1 ⊢ ¬ (3 / 2) ∈ ℤ |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 ∧ wa 103 ↔ wb 104 ∈ wcel 1480 class class class wbr 3929 (class class class)co 5774 ℝcr 7619 0cc0 7620 1c1 7621 + caddc 7623 · cmul 7625 < clt 7800 / cdiv 8432 2c2 8771 3c3 8772 4c4 8773 ℤcz 9054 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-cnex 7711 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-mulrcl 7719 ax-addcom 7720 ax-mulcom 7721 ax-addass 7722 ax-mulass 7723 ax-distr 7724 ax-i2m1 7725 ax-0lt1 7726 ax-1rid 7727 ax-0id 7728 ax-rnegex 7729 ax-precex 7730 ax-cnre 7731 ax-pre-ltirr 7732 ax-pre-ltwlin 7733 ax-pre-lttrn 7734 ax-pre-apti 7735 ax-pre-ltadd 7736 ax-pre-mulgt0 7737 ax-pre-mulext 7738 |
This theorem depends on definitions: df-bi 116 df-3or 963 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-reu 2423 df-rmo 2424 df-rab 2425 df-v 2688 df-sbc 2910 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-id 4215 df-po 4218 df-iso 4219 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 df-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-pnf 7802 df-mnf 7803 df-xr 7804 df-ltxr 7805 df-le 7806 df-sub 7935 df-neg 7936 df-reap 8337 df-ap 8344 df-div 8433 df-inn 8721 df-2 8779 df-3 8780 df-4 8781 df-n0 8978 df-z 9055 |
This theorem is referenced by: nn0o1gt2 11602 |
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